@media screen and (max-width: 1280px) {

    .layout-head,
    .layout-main,
    .layout-foot {
        width: 1100px;
        margin: 0 auto;
    }
}

@media screen and (min-width:1281px) and (max-width:1440px) {

    .layout-head,
    .layout-main,
    .layout-foot {
        width: 92%;
        margin: 0 auto;
    }
}

@media screen and (min-width:1441px) and (max-width:1920px) {

    .layout-head,
    .layout-main,
    .layout-foot {
        width: 94%;
        margin: 0 auto;
    }
}

@media screen and (min-width:1921px) {

    .layout-head,
    .layout-main,
    .layout-foot {
        width: 1900px;
        margin: 0 auto;
    }
}